a(n) + a(n+2) = n^3.

Terms

a(0) =0a(1) =1a(2) =1a(3) =7a(4) =26a(5) =57a(6) =99a(7) =159a(8) =244a(9) =353a(10) =485a(11) =647a(12) =846a(13) =1081a(14) =1351a(15) =1663a(16) =2024a(17) =2433a(18) =2889a(19) =3399a(20) =3970a(21) =4601a(22) =5291a(23) =6047a(24) =6876a(25) =7777a(26) =8749a(27) =9799a(28) =10934a(29) =12153